The National Police Agency has announced that 19,820 crimes by foreigners were recorded in 2010, a fall of 28.8% compared with 2009. The cases involved a total of 11,866 individuals, down 10.5%. This continues the declining trend seen since 2004-5. Thefts and robberies were down 36.3% and now stand at half the level seen 10 years ago. In particular, the NPA says it has successfully cracked down on organized car stealing rings. There was also a 22.5% reduction in overstayers and other visa violations. One area did see a notable rise: 471 people were found to be in fake marriages which was 25.6% up from last year and the police believe there are more cases out there. Chinese made up the largest group of offenders with a total of 4,659. Koreans were next with 1,399 followed by 1,128 Filipinos, 798 Vietnamese and 728 Brazilians.
Source (Japanese)